Wonderful web site. We bought a Toto Ultramax based on your reviews, and have been very happy with it. It's now time to buy a second toilet, but we're considering the lower profile Toto Supreme this time. It has the Power Gravity flush rather than G-max. I've read your other messages here and can only see where you've said that the Power Gravity "should be fine" -- do you have a firm comparison? Can other readers add their experiences? I like the sleeker look of the Supreme but I'm not willing to sacrifice performance.